Eccentric gear



(No Model.) W. R. BROWN.

EGGENTRIG GEAR.

No. 546,757. Patented Sept. 24, 1895.

UNITED STATES PATENT @TTTCE.

WILLIAM R. BROWN, OF NEW MARKET, INDIANA.

ECCENTRIC GEAR.

SPECIFICATION forming part of Letters Patent No. 546,757, datedSeptember 24, 1895.

Application filed June 7, 1895. Serial No. 551,978. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM R. BROWN, a citizen of the United States,residing at New Market, in the county of Montgomery and State ofIndiana, have invented a new and useful Shiftable Eccentric, of whichthe following is a specification.

My invention relates solely to improvements in shiftable eccentrics, andhas for its object the production of a mechanism of the characterdescribed in which the operating parts are very simple, durable, andeflicient; and it consists in the peculiar organization of the severalparts, which is fully set forth in the following description and claim.

Referring to the accompanying drawings, forming a part of thisspecification, Figure 1 is an elevation of my invention entire. Fig. 2is an end plan of my invention. Fig. 3 is a view obtained by looking atmy invention in the direction shown by arrow A, Fig. 1. Fig. 4 is alongitudinal section of' my invention entire on the line mm, Fig. 2.Fig. 5 is a detail view of the movable circular disk 2. Fig. 6 is a viewof the disk-boxing 3. Fig. 7 is a detail view of the shaft-ring 4.,frame 5, bars 6, and links 7.

Like numbers of reference indicate corresponding parts throughout theseveral views.

In the embodiment of my invention I usea revoluble shaft 1, a shiftablecircular disk 2, a disk-boxing 3 in the two sections, a movableshaft-ring 4, a frame 5, a pair of bars 6, and a pair of links 7,coupling the bars and the circular disk.

The revoluble shaft 1 is provided with a sectional disk -boxing 3,rigidly mounted thereon in two sections, and a circular disk 2, mountedmovably on the inner rims of the sectional boxing. The circular disk 2is formed with an oblong opening 2, which receives the inner rims of thesectional boxing for the purpose of permitting it to be throwntransversely on the boxing and revoluble shaft and radially in twodirections from the center of its figure. The circular disk 2 isprovided with means for operating it transversely on its boxing andrevoluble shaft, which comprises a shaft-ring 4, aframe 5, a pair ofbars 6, and a pair of links 7. The shaft-ring 4 and the pivoted frame 5encircle the revoluble shaft 1 and are longitudinally movable thereon.The pair of bars 6 are mounted in grooves 1' on the revoluble shaft andare longitudinally movable in said grooves between the disk-boxing andthe shaft. The links 7 connect the bars 6 and the circular disk 2 bypivot-pins in the usual manner. The pivoted frame 5 couples theshaft-ring4 and the movable bars 6 by pivot-pins 5', mounted in theusual way through the lugs 4. of the shaftring and the lugs 6' of themovable bars. It will be observed that the sectional circular boxing 3is formed with the necessary openings essential for the operation of thelinks 7 and bars 6.

My invention is operated as follows: The shaft-ring 4 is movedlongitudinally in either direction on the revoluble shaft to the extremelimit of its travel, which also moves the pivoted frame, the bars, andthe pivoted links in the direction of the movement of said ring, andsimultaneously therewith causes the circular disk to move transverselyon its boxing and revoluble shaft to the extreme limit of its travel andlooks it rigidly in this position. It will be noticed that when thecircular disk is locked in position one of the links 7 stands outradially from its movable bar, which holds the disk firmly in itsposition, and that the other link 7 has swung down almost parallel withits bar. The shaftring at is moved longitudinally on the revoluble shaftto the other extreme limit of its travel, which again moves said frame,bars, and links in the direction of its movement and causes the circulardisk to move transversely on its boxing and revoluble shaft to the otherextreme limit of its travel, coincidently with the movement of theshaft-ring, and to be rigidly held in position by the link 7, standingout radially from its movable bar. In this construction I have produceda simple, durable, and efiicient mechanism for shifting the circulardisk from one side of the revoluble shaft-center to the other and forsecuring it rigidly and firmly in either position, which may be appliedwith advantage to steam-engines and other machinery requiring the use ofshiftable eccentrics.

Having thus fully described my invention and set forth the operation andadvantages thereof, what I claim as new, and desire to secure by LettersPatent, is

In a shiftable eccentric, the combination oted frame,a pair of movablebars, and apair with the revolnble shaft and sectional boxing of links,all as, and for the purposes, set forth, rigidly mounted thereon, of themovable oirsubstantially as specified.

cular disk, an oblong opening in said disk, and VILLIAM' R. BRO\VN. 5means for operating said disk transversely on Witnesses:

its sectional boxing and revoluble shaft, said WILLIAM II. BROWN,

means comprising a movable shaft ring, a piv- SAMUEL M. ZACHARY.

